Steam boiler



May 27, 1930. s. B. GORBUTT STEAM BOILER Filed April 1927 JAZZ/ENTER 6 5. 6 0/? 5077' E @@W llll """IIII'I k I I fl l [I'll/IE M 0 .W 9 0 M 1 w y: w 1:2: P M 1 m w m [M]. I

000 oooo)oog oo0 Patented May 27, 1930 UNITED STATES STEEL WORKS, OF PORTLAND, OREGON STEAM BOILER Application filed April 6, 1927. Serial N0. 181,385.

This invention relates generally to steam boilers, and particularly to the upright type of boiler.

The main object of this invention is to provide a dry pipe for boilers which will be efficient in operation, easily installed and adapted to changes in length due to variations arising from manufacture or changes in temperature.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawing, in

which Figure 1 is an elevation of a boiler such as is commonly used in the logging industry with portions broken away to disclose the parts. Figure 2 is a horizontal section taken along the line 2-2 in Figure 1. Figure 3 is a vertical section taken along the line 33 in Figure 1. Figure 4: is a vertical section taken along the line H in Figure 1. Figure 5 is a vertical section taken along the line 55 in Figure 1.

Similar numbers of reference refer to similar parts throughout the several views.

Referring in detail to the drawing, there is illustrated a boiler shell 10 whose fire box wall 11 tapers slightly so that its lower end is nearer the shell 10 than its upper end for the purpose of improving the circulation of the boiler. The usual stays 12 are provided between the members 10 and 11 and a hand hole 13 is also provided for cleaning out purposes.

A crown sheet 14 is'attached to the fire box wall 11 by means of the rivets 15 and supports the lower ends of the tubes 16 whose upper ends are secured in the upper tube plate 17 which is joined by an upper shell 18 to the main shell 10 by means of a throat sheet 19 and the rivets 20.

The dry pipe about to be described extends entirely across the shell 18 and consists of a longitudinal member 21 of a somewhat oval cross section in whose upper rounded portion 22 are formed the slots 23 through which dry steam can enter the dry pipe 21. The ends 24 are downturned and terminate in vertical flanges 25 which slidably receive the sleeves 26 which connect with the pipes 27 which SIDNEY B. eonnurr, or PORTLAND, oaneon, Assrenon TO wmnmm IRON AND pipes are attached to the shell 18 by'means of theflange 28. a I v H Dry steam can be taken away from the boiler by the pipe 27 from eitherend of the dry pipe 21,. although obviously if this is not desired either end of the pipe may be capped over, it being merely desirableto xretain 'a short sectio'nof pipe 26 which acts as a support for the dry pipe.

On the upper side of the pipe 21 formed the lugs 29 which contain slots 30 which loose- 1y engage the lugs 31 welded to the under side of the upper tube plate 17. :This insures the dry pipe remaining in an upright position and prevents same from ever coming in contact with the sides of the tubes 16 which might otherwise cause undue wear owing to the intense vibration to which such equipment is subjected, the object, of course, being to keep the side of the dry pipe out of contact with the tubes.

It can be seen by this arrangement of slots in the upper portion of the dry pipe that steam is taken from nearer the middle of the boiler than is ordinarily the case, thereby insuring the accompaniment of less moisture. Also the area of the outlet openings 23 is suficient to reduce the velocity ofthe steam at these openings to a speed which will not carry over an objectionable amount of moisture.

lVhile it might appear that the special form of Water leg was not related in anyway to the special form of dry pipe, it is found in practice that it is desirable to keep the holes in the dry pipe well toward its middle owing to the rapid circulation of water caused by the converging water leg, which would otherwise tend to cause water-laden steam to enter the dry pipe near its ends and to defeat the object of the invention.

I claim:

1. An upright cylindrical boiler having a plurality of vertical fire tubes passmg through the top thereof, a dry pipe positioned diametrically across same close to the top thereof between said fire tubes, said pipe having downwardly ofiset ends, a plurality of inlet openings formed in the top side thereof, said offset ends having ferrules therein slidably mounted in the sides of the boiler, and means for preventing said pipe from rotating on its supports to prevent the contacting of said pipe with said fire tubes.

2. A dry pipe for vertical fire tube boilers consisting of a hollow elongated member adapted to be horizontally placed'under the upper tube plate of a boiler between its tubes and having a plurality of slots formed in its upper side having its outlet ends downturned and provided with outlet pipes for slidably mounting same on the sides of a boiler, and

means for preventing the rotation of said dry pipe on its supports to hold-said; dry pipe out of contact with said tubes. 1

3. A dry pipe-for vertical fire tube-boilers consisting of a hollow longitudinal member of somewhat oval cross sectionhaving fiattened vertical sides and having its upper middle portion provided'with a plurality of inlet openings and having its outer ends downwardly-and outwardly turned to receive 'slidable supporting members and having projections on its upper side adapted to engage corresponding projections from the boiler for the purpose'of preventing the rotation of the pipe on its support to hold said dry pipe out of contact with said tubes.

SIDNEY B GORBUTT. 

